<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @subpackage Object
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Royalmail.php 23775 2011-03-01 17:25:24Z ralph $
 */

/**
 * @see Zend_Barcode_Object_ObjectAbstract
 */
require_once 'Zend/Barcode/Object/ObjectAbstract.php';

/**
 * @see Zend_Validate_Barcode
 */
require_once 'Zend/Validate/Barcode.php';

/**
 * Class for generate Royal maim barcode
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Barcode_Object_Royalmail extends Zend_Barcode_Object_ObjectAbstract {
	
	/**
	 * Coding map
	 * - 0 = Tracker, Ascender and Descender
	 * - 1 = Tracker and Ascender
	 * - 2 = Tracker and Descender
	 * - 3 = Tracker
	 * @var array
	 */
	protected $_codingMap = array ('0' => '3300', '1' => '3210', '2' => '3201', '3' => '2310', '4' => '2301', '5' => '2211', '6' => '3120', '7' => '3030', '8' => '3021', '9' => '2130', 'A' => '2121', 'B' => '2031', 'C' => '3102', 'D' => '3012', 'E' => '3003', 'F' => '2112', 'G' => '2103', 'H' => '2013', 'I' => '1320', 'J' => '1230', 'K' => '1221', 'L' => '0330', 'M' => '0321', 'N' => '0231', 'O' => '1302', 'P' => '1212', 'Q' => '1203', 'R' => '0312', 'S' => '0303', 'T' => '0213', 'U' => '1122', 'V' => '1032', 'W' => '1023', 'X' => '0132', 'Y' => '0123', 'Z' => '0033' );
	
	protected $_rows = array ('0' => 1, '1' => 1, '2' => 1, '3' => 1, '4' => 1, '5' => 1, '6' => 2, '7' => 2, '8' => 2, '9' => 2, 'A' => 2, 'B' => 2, 'C' => 3, 'D' => 3, 'E' => 3, 'F' => 3, 'G' => 3, 'H' => 3, 'I' => 4, 'J' => 4, 'K' => 4, 'L' => 4, 'M' => 4, 'N' => 4, 'O' => 5, 'P' => 5, 'Q' => 5, 'R' => 5, 'S' => 5, 'T' => 5, 'U' => 0, 'V' => 0, 'W' => 0, 'X' => 0, 'Y' => 0, 'Z' => 0 );
	
	protected $_columns = array ('0' => 1, '1' => 2, '2' => 3, '3' => 4, '4' => 5, '5' => 0, '6' => 1, '7' => 2, '8' => 3, '9' => 4, 'A' => 5, 'B' => 0, 'C' => 1, 'D' => 2, 'E' => 3, 'F' => 4, 'G' => 5, 'H' => 0, 'I' => 1, 'J' => 2, 'K' => 3, 'L' => 4, 'M' => 5, 'N' => 0, 'O' => 1, 'P' => 2, 'Q' => 3, 'R' => 4, 'S' => 5, 'T' => 0, 'U' => 1, 'V' => 2, 'W' => 3, 'X' => 4, 'Y' => 5, 'Z' => 0 );
	
	/**
	 * Default options for Postnet barcode
	 * @return void
	 */
	protected function _getDefaultOptions() {
		$this->_barThinWidth = 2;
		$this->_barHeight = 20;
		$this->_drawText = false;
		$this->_stretchText = true;
		$this->_mandatoryChecksum = true;
	}
	
	/**
	 * Width of the barcode (in pixels)
	 * @return integer
	 */
	protected function _calculateBarcodeWidth() {
		$quietZone = $this->getQuietZone ();
		$startCharacter = (2 * $this->_barThinWidth) * $this->_factor;
		$stopCharacter = (1 * $this->_barThinWidth) * $this->_factor;
		$encodedData = (8 * $this->_barThinWidth) * $this->_factor * strlen ( $this->getText () );
		return $quietZone + $startCharacter + $encodedData + $stopCharacter + $quietZone;
	}
	
	/**
	 * Partial check of interleaved Postnet barcode
	 * @return void
	 */
	protected function _checkParams() {
	}
	
	/**
	 * Prepare array to draw barcode
	 * @return array
	 */
	protected function _prepareBarcode() {
		$barcodeTable = array ();
		
		// Start character (1)
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, 5 / 8 );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, 1 );
		
		// Text to encode
		$textTable = str_split ( $this->getText () );
		foreach ( $textTable as $char ) {
			$bars = str_split ( $this->_codingMap [$char] );
			foreach ( $bars as $b ) {
				$barcodeTable [] = array (1, $this->_barThinWidth, ($b > 1 ? 3 / 8 : 0), ($b % 2 ? 5 / 8 : 1) );
				$barcodeTable [] = array (0, $this->_barThinWidth, 0, 1 );
			}
		}
		
		// Stop character (1)
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, 1 );
		return $barcodeTable;
	}
	
	/**
	 * Get barcode checksum
	 *
	 * @param  string $text
	 * @return int
	 */
	public function getChecksum($text) {
		$this->_checkText ( $text );
		$values = str_split ( $text );
		$rowvalue = 0;
		$colvalue = 0;
		foreach ( $values as $row ) {
			$rowvalue += $this->_rows [$row];
			$colvalue += $this->_columns [$row];
		}
		
		$rowvalue %= 6;
		$colvalue %= 6;
		
		$rowchkvalue = array_keys ( $this->_rows, $rowvalue );
		$colchkvalue = array_keys ( $this->_columns, $colvalue );
		return current ( array_intersect ( $rowchkvalue, $colchkvalue ) );
	}
}
